IEC 60728-14:2014 describes the system and equipment specification of FTTH\/FTTB (fibre to the home\/fibre to the building) networks where information is transmitted in both, forward and return path directions using RF subcarrier multiplexing technology, and where the return path transmission uses additionally time division multiple access technique imposed by the transmission of the return path signals using a TDMA (e.g. TDMA mode of DOCSIS) protocol. Such systems are called RF over Glass (RFoG) and consist of an RFoG optical network unit (R-ONU), an optical distribution network based on xPON structure, and an RFoG optical return path receiver. This standard specifies the basic system parameters and methods of measurement for RFoG systems in order to assess the system performance and its performance limits.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 8<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 3.2 Symbols 3.3 Abbreviations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 4 System reference model <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5 RFoG ONU reference architecture Figures Figure 1 \u2013 Optical system reference model for RFoG <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6 Method of measurements 6.1 Optical power 6.2 Centroidal wavelength and spectral width under modulation Figure 2 \u2013 Principle schematics of R-ONU <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.3 Optical wavelength 6.4 Linewidth and chirping of transmitters with single mode lasers 6.5 Optical modulation index 6.6 Reference output level of an optical receiver 6.7 Noise parameters of optical transmitters and optical receivers 6.8 Relative intensity noise (RIN), optical modulation index and equivalent input noise current (EINC) 6.9 Carrier level and carrier-to-noise ratio 6.10 Noise power ratio (NPR) Figure 3 \u2013 Measurement of optical wavelength using WDM coupler <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.11 Carrier-to-noise ratio defined by optical signal 6.12 Carrier-to-crosstalk ratio (CCR) 7 System performance requirements 7.1 Digital data system 7.1.1 ODN 7.1.2 Performance allocation Tables Table 1 \u2013 ODN Specifications <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.2 Forward path and return path frequency split 8 RFoG equipment specifications 8.1 General specifications 8.1.1 Safety 8.1.2 Electromagnetic compatibility (EMC) 8.1.3 Environmental conditions Table 2 \u2013 RF frequencies <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 8.1.4 Marking 8.2 R-ONU 8.2.1 Indicators 8.2.2 R-ONU forward path receiver specifications <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Table 3 \u2013 Classification of R-ONU optical receivers Table 4 \u2013 Data publication requirements for R-ONU optical receivers Table 5 \u2013 Recommendations for R-ONU optical receivers <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 8.2.3 Return path performance of R-ONU Table 6 \u2013 Performance requirements for R-ONU optical receivers Table 7 \u2013 Classes of optical return path transmitters <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Table 8 \u2013 Data publication requirements for optical return path transmitters Table 9 \u2013 Performance requirements for optical parameters and interfaces <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Table 10 \u2013 Electrical properties requirements for R-ONU optical return path transmitters Table 11 \u2013 R-ONU turn-on and turn-off specifications <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 8.2.4 Remote control functions Figure 4 \u2013 R-ONU turn-on and turn-off diagram <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure 5 \u2013 Example of the remote control system configuration Table 12 \u2013 Remote control items <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure 6 \u2013 Data format Figure 7 \u2013 Structure of data packet Table 13 \u2013 Fundamental specification of data communication Table 14 \u2013 Content of data packets <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure 8 \u2013 Control transfer process Figure 9 \u2013 Timing of data transmission Table 15 \u2013 R-ONU address <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Table 16 \u2013 Recommendation for timing of data transmission Table 17 \u2013 Remote control command codes <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 8.3 Headend specifications 8.3.1 Headend forward path specifications 8.3.2 Headend return path specifications: R-RRX Table 18 \u2013 Specification of modulation for the remote control signal <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Table 19 \u2013 Data publication requirements for return path optical receivers Table 20 \u2013 Performance requirements for optical return path receivers <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Annex A (informative) Implementation notes <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Figure\u00a0A.1 \u2013 Placement of attenuators when system loss is too low <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Annex B (informative) System loss specification B.1 General B.2 Forward path considerations <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | B.3 Return path considerations Figure B.1 \u2013 Performance allocation of the return path transmission system <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure B.2 \u2013 Section C\/N specification for SDU and MDU in-house wiring <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Annex C (informative) Optical beat interference C.1 General C.2 Operating conditions of ODN C.3 Operating conditions of optical receiver at the headend system Table C.1 \u2013 Operating conditions related to ODN parameters <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | C.4 Operating conditions of CMTS C.5 Environmental conditions C.6 Relation between optical transmission loss and OMI Table C.2 \u2013 Operating conditions related to ODN parameters Table C.3 \u2013 Environmental conditions for system evaluation <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | C.7 Design margin of ODN Figure C.1 \u2013 Optical transmission loss and OMI Figure C.2 \u2013 ODN design margin <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | C.8 Example of system design Table C.4 \u2013 Factors affecting the transmission loss of ODN Table C.5 \u2013 System design example 1 Table C.6 \u2013 System design example 2 <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | C.9 Method of measurement of OBI C.9.1 Purpose C.9.2 Measurement setup C.9.3 Example of measurement conditions Figure C.3 \u2013 Setup used for the measurement of OBI Table C.7 \u2013 Example of list of measurement conditions <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | C.9.4 Procedure C.9.5 Presentation of results C.10 Method of measurement of OBI (measurement with CW signals) C.10.1 Purpose C.10.2 Measurement setup Table C.8 \u2013 Presentation of OBI measurement results <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | C.10.3 Procedure Figure C.4 \u2013 Setup used for the measurement of OBI (CW method) Table C.9 \u2013 Presentation of OBI measurement results <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Annex D (normative) Optional remote control manager Table D.1 \u2013 Performance requirements for the FSK transmitter <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | Annex E (informative) Outdoor housings for R-ONU protection <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Annex F (informative) Effect of off-state optical power on C\/N ratio of transmission signal <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Cable networks for television signals, sound signals and interactive services – Optical transmission systems using RFoG technology<\/b><\/p>\n |